Service indicator



FIG. 1 is a perspective view of a service indicator showing my newdesign, wherein the lined pattern indicates the colors red, brown andgreen;

FIG. 2 is a side elevational view thereof, with the opposite sides beinga mirror image;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The ornamental design for a service indicator, as shown and described.